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Telegram/lib_crl/crl/crl_object_on_thread.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include <crl/common/crl_common_object_async.h>
+#include <crl/common/crl_common_list.h>
+#include <condition_variable>
+
+namespace crl {
+namespace details {
+
+class thread_policy {
+protected:
+	thread_policy();
+
+	template <typename Callable>
+	void async_plain(Callable &&callable) const;
+
+private:
+	void run();
+	void wake_async() const;
+
+	mutable std::mutex _mutex;
+	mutable std::condition_variable _variable;
+	mutable details::list _list;
+	mutable std::atomic_flag _queued = ATOMIC_FLAG_INIT;
+
+};
+
+template <typename Callable>
+void thread_policy::async_plain(Callable &&callable) const {
+	if (_list.push_is_first(std::forward<Callable>(callable))) {
+		wake_async();
+	}
+}
+
+} // namespace details
+
+template <typename Type>
+using weak_on_thread = details::weak_async<details::thread_policy, Type>;
+
+template <typename Type>
+using object_on_thread = details::object_async<details::thread_policy, Type>;
+
+} // namespace